Trigononmetry Problem/ Picture?

**suckatmaths** · May 30th 2009, 11:36 PM

I really need help with this Trigonometry Question.

"From an observer O, the angles of elevation to the bottom and the top of a flagpole are 36degrees and 38degrees respectively. Find the height of the flagpole. (Find AB and AC).

-Picture to problem: http://s525.photobucket.com/albums/cc340...

Thanks in advance.

(I have tried twice, but got two different answers... 11 + 12 something...

)

**suckatmaths** · May 31st 2009, 12:25 AM

I think this link will work: ujwjw picture by EdenJonas - Photobucket

**skeeter** · May 31st 2009, 04:52 AM

$\tan(38^{\circ}) = \frac{AC}{200}$

$AC = 200\tan(38^{\circ})$

$\tan(36^{\circ}) = \frac{AB}{200}$

$AB = 200\tan(36^{\circ})$

so, height of the flagpole ...

$BC = AC - AB$

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